Just as an informative note :

I came across this article, and the corresponding paper from 2012:

GRAVITATIONAL FIELD EQUATIONS AND

THEORY OF DARK MATTER AND DARK ENERGY

(TIAN MA AND SHOUHONG WANG)

"A pair of mathematicians -- one from Indiana University and the other from Sichuan University in China -- have proposed a unified theory of dark matter and dark energy that alters Einstein's equations describing the fundamentals of gravity"

Link article :

http://www.sciencedaily.com/releases/2012/09/120906092059.htm

Link paper :

http://arxiv.org/pdf/1206.5078.pdf